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Peterbilt Parts

Explore a huge inventory of aftermarket Peterbilt truck parts and accessories designed for model-specific fitment on classic and next-gen models (379, 579, 389 Glider, 362, 320, UltraLoft and more). Maximize the performance of your PACCAR truck with OEM-alternative replacement parts. Restore and refurbish your interior cab with Peterbilt accessories and stylize the exterior with sleek Peterbilt chrome upgrades all in one place: 4 State Trucks.

Peterbilt Parts

High-Performance Peterbilt Aftermarket Parts & Custom Accessories

If you're looking to upgrade your Peterbilt truck, the best route you can take is to start investing in high-quality aftermarket parts. Whether you're driving the iconic Peterbilt 379 or a newer 567 or 579 model, we’ve got the parts to keep your big rig handling with precision and looking sharp. At 4 State Trucks, we know what matters to owner-operators and fleet managers alike. You need parts that can perform consistently - and a little style doesn’t hurt either. That’s why we carry one of the most trusted selections of aftermarket Peterbilt parts anywhere online. From under-the-hood performance parts to stylish polished chrome exterior parts, we've got you covered: Need more fuel storage capacity? Grab a Peterbilt fuel tank replacement and get back on the road fast. Want to customize your exterior? Add some luster with our long-drop chrome exhaust elbows and other chrome accessories. Reinventing your Pete truck's interior cab space? Refresh your ride with Peterbilt 379 and 389 interior trim kits and get some extra driving comfort. Every one of our Peterbilt replacement parts is designed for long hauls and the demands of the road. A more affordable alternative to traditional OEM Peterbilt parts, our selection doesn't skimp on real-world performance. We carry parts for: - Engine components (prevent your engine from overheating). - Suspension systems (for a smoother ride). - Fuel and air systems (avoid frequent, costly pit stops). - Semi-truck exhaust upgrades (stylish chrome stack tops). - Cab accessories and interior parts (unique upholstery and trim). And it’s not just about function. Our aftermarket parts let you customize your truck to match your personality. Because let's face it—your Peterbilt isn’t just any truck. It’s a reflection of your craft as a professional driver. So if you’re looking for the best in aftermarket Peterbilt truck parts, 4 State Trucks has your back.

Frequently Asked Questions About Peterbilt Parts

Which Peterbilt parts fit my specific truck model and year?

Peterbilt parts compatibility varies significantly by model (379, 389, 567, 579) and year range. Most aftermarket parts list specific model years they fit, such as "2005-2007 379" or "2008+ 389." Always check the product description for your exact model/year combination. Key differences include hood lengths (127" vs 131"), headlight configurations (dual vs quad), and mounting hole patterns. When in doubt, contact us with your OEM number for verification before ordering.

What's the difference between OEM and aftermarket Peterbilt parts quality?

OEM parts are manufactured to Peterbilt's exact specifications, ensuring perfect fit and original quality. Aftermarket parts vary widely - premium brands like Jones Performance and Roadworks match or exceed OEM quality with enhanced features, while economy options may use thinner materials or less precise manufacturing. For critical components like air lines and electrical parts, OEM or premium aftermarket is recommended. For cosmetic items like grille bars or light bezels, quality aftermarket options provide excellent value.

How difficult is it to install Peterbilt bumpers and exterior accessories?

Installation difficulty depends on the part. Bumpers typically require 2-3 hours with basic tools and often need two people due to weight (150-300 lbs). Most bolt directly to existing mounting points, but some aftermarket bumpers may require drilling. Common challenges include aligning fog light wiring, adjusting for proper hood clearance, and ensuring level mounting. Grilles and light bars usually install in 30-60 minutes. Professional installation is recommended for air ride suspensions and complex electrical components.

What finishes and materials are available for Peterbilt chrome parts?

Peterbilt parts come in several finishes: mirror-polished stainless steel (most durable, won't rust), triple-chrome plated steel (classic look, requires maintenance), powder-coated aluminum (lightweight, various colors), and ABS plastic chrome (economical, for non-structural parts). Stainless steel costs more initially but lasts longer in harsh conditions. Chrome-plated parts offer the brightest shine but need regular polishing and can pit in winter climates. Powder coating provides color options and good durability for brackets and non-show parts.

Do I need to modify my Peterbilt to install aftermarket parts?

Most quality aftermarket parts are designed as direct replacements requiring no modifications. However, some situations require minor adjustments: custom bumpers may need new bracket holes drilled, LED conversions might require resistors or flasher relay changes, and oversized parts like 20-inch bumpers on pre-2005 models may need spacers. Always verify "direct fit" claims in product descriptions. Parts requiring cutting, welding, or significant modifications will be clearly noted. Keep factory parts when possible in case you need to return to stock configuration.

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